author | pliden |
Tue, 12 Jun 2018 17:40:28 +0200 | |
changeset 50525 | 767cdb97f103 |
child 50975 | b833992fa8fa |
permissions | -rw-r--r-- |
50525
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/* |
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. |
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*/ |
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#include "precompiled.hpp" |
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#include "gc/z/zUtils.inline.hpp" |
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#include "unittest.hpp" |
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#include <limits> |
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template <typename T> |
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static T max_alignment() { |
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T max = std::numeric_limits<T>::max(); |
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return max ^ (max >> 1); |
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} |
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TEST(ZUtilsTest, round_up_power_of_2) { |
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EXPECT_EQ(ZUtils::round_up_power_of_2(1u), 1u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(2u), 2u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(3u), 4u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(4u), 4u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(5u), 8u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(6u), 8u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(7u), 8u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(8u), 8u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(9u), 16u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(10u), 16u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(1023u), 1024u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(1024u), 1024u); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(1025u), 2048u); |
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const size_t max = max_alignment<size_t>(); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(max - 1), max); |
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EXPECT_EQ(ZUtils::round_up_power_of_2(max), max); |
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} |
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TEST(ZUtilsTest, round_down_power_of_2) { |
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EXPECT_EQ(ZUtils::round_down_power_of_2(1u), 1u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(2u), 2u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(3u), 2u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(4u), 4u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(5u), 4u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(6u), 4u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(7u), 4u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(8u), 8u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(9u), 8u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(10u), 8u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(1023u), 512u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(1024u), 1024u); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(1025u), 1024u); |
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const size_t max = max_alignment<size_t>(); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(max), max); |
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EXPECT_EQ(ZUtils::round_down_power_of_2(max - 1), max / 2); |
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} |